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FPD2250SOT89 Datasheet(PDF) 8 Page - Filtronic Compound Semiconductors |
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FPD2250SOT89 Datasheet(HTML) 8 Page - Filtronic Compound Semiconductors |
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8 / 8 page  FPD2250SOT89 LOW NOISE, HIGH LINEARITY PACKAGED PHEMT Phone: +1 408 850-5790 http://www.filtronic.co.uk/semis Revised: 01/05/05 Fax: +1 408 850-5766 Email: sales@filcsi.com • TYPICAL I-V CHARACTERISTICS Note: The recommended method for measuring IDSS, or any particular IDS, is to set the Drain-Source voltage (VDS) at 1.3V. This measurement point avoids the onset of spurious self-oscillation which would normally distort the current measurement (this effect has been filtered from the I-V curves presented above). Setting the VDS > 1.3V will generally cause errors in the current measurements, even in stabilized circuits. Recommendation: Traditionally a device’s IDSS rating (IDS at VGS = 0V) was used as a predictor of RF power, and for MESFETs there is a correlation between IDSS and P1dB (power at 1dB gain compression). For pHEMTs it can be shown that there is no meaningful statistical correlation between IDSS and P1dB; specifically a linear regression analysis shows r 2 < 0.7, and the regression fails the F-statistic test. IDSS is sometimes useful as a guide to circuit tuning, since the S22 does vary with the quiescent operating point IDS. DC IV Curves FPD2250SOT89 0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 Drain-Source Voltage (V) VG=-1.50V VG=-1.25V VG=-1.00V VG=-0.75V VG=-0.50V VG=-0.25V VG=0V |
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